I honestly think that if MOS does not do well, the future of the Superman character altogether is going to be in serious trouble. DC, for many years now, simply does not know what to do with the character.
No offense to the Silver Age fanboys, but the 1986 reboot got many things right, and until the Death of Superman arc, we were given solid, consistent Superman stories. The creative teams stayed on the books for a while, and they were able to craft a growing continuity, coupled with a wide array of compelling supporting characters. You really got the sense that Superman's world was evolving and maturing, but after the Death/Return stunt, DC just kept on piling on cheap stunts and gimmicks to keep people interested, and Superman has been limping on ever since.
No one asked for the Birthright redo, or the Infinite Crisis reboot, or even the new 52. They simply keep pushing the reset button on the character, with no clear idea of what the hell they are doing.
The upcoming film really is the last hope for the character and for Superman fans, because if the film is a disappointment, I shudder at the thought of what DC/WB might do next. Although I accept the fact that Superman represents the prime superhero archetype, there is something about the character that is pushing people away for whatever, and so far, I don't think anyone has been able to figure it out.